Difference between revisions of "File:Kernel-loc-changes-compared-to-rhel5.png"

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* Even without drivers RHEL5 patches add/delete 434 KLOC, which is 8.5x times bigger then OpenVZ kernel modifications (51 KLOC);
 
* Even without drivers RHEL5 patches add/delete 434 KLOC, which is 8.5x times bigger then OpenVZ kernel modifications (51 KLOC);
 
* OpenVZ based on mainstream 2.6.27 kernel requires 40% less modifications (not counting modules) due to on going mainstream integration.
 
* OpenVZ based on mainstream 2.6.27 kernel requires 40% less modifications (not counting modules) due to on going mainstream integration.
 +
 +
=== Source data ===
 +
<pre>
 +
RHEL5 U3 2.6.18-128.1.1.el5
 +
 +
      files       add          del
 +
      ----- ---------      -------
 +
combined: 4962 1 190 308 210 460
 +
` drivers: 2179   800 889 166 009
 +
` other: 2783   389 419 44 451
 +
    ` xen 713   124 721   9 087
 +
    ` ext4   33   28 631       0 /* backported */
 +
    ` gfs   72   27 786       0
 +
    ` utrace 114   13 741   6 818
 +
    ` other 1851   194 540 28 546
 +
 +
 +
OpenVZ 2.6.18-028stab062
 +
 +
combined: 980   79 054   6 644
 +
` mod:   66   34 621       0
 +
    ` cpt   47   21 747       0
 +
    ` other   19   12 874       0
 +
` core: 914   44 433   6 644
 +
    ` bc 190   11 719     669
 +
    ` fsched   53     4 195     515
 +
    ` hfixes 222     4 036   1 185
 +
    ` 4gb   72     2 308     709
 +
    ` other 377   22 175   3 566
 +
 +
 +
OpenVZ 2.6.27-aivazovsky
 +
 +
combined: 510   59 606   2 921
 +
` mod:   65   31 933       0
 +
` core: 455   27 673   2 921
 +
</pre>

Revision as of 11:34, 25 March 2009

Description

This shows KLOC (thousands lines of code) changes in three kernels:

  • OpenVZ 2.6.27-aivazovsky,Z based on vanilla 2.6.27 kernel.
  • OpenVZ 2.6.18-028stab062.1, based on RHEL5 U3 kernel.
  • RHEL5 U3 2.6.18-128.1.1.el5, based on vanilla 2.6.18 kernel.

Conclusions

  • Even without drivers RHEL5 patches add/delete 434 KLOC, which is 8.5x times bigger then OpenVZ kernel modifications (51 KLOC);
  • OpenVZ based on mainstream 2.6.27 kernel requires 40% less modifications (not counting modules) due to on going mainstream integration.

Source data

RHEL5 U3 2.6.18-128.1.1.el5

	       files		      add           del
	       -----		---------       -------
combined:	4962		1 190 308	210 460
 ` drivers:	2179		  800 889	166 009
 ` other:	2783		  389 419	 44 451
    ` xen	 713		  124 721	  9 087
    ` ext4	  33		   28 631	      0 /* backported */
    ` gfs	  72		   27 786	      0
    ` utrace	 114		   13 741	  6 818
    ` other	1851		  194 540	 28 546


OpenVZ 2.6.18-028stab062

combined:	 980		   79 054	  6 644
 ` mod:	  66		   34 621	      0
    ` cpt	  47		   21 747	      0
    ` other	  19		   12 874	      0
 ` core:	 914		   44 433	  6 644
    ` bc	 190		   11 719	    669
    ` fsched	  53		    4 195	    515
    ` hfixes	 222		    4 036	  1 185
    ` 4gb	  72		    2 308	    709
    ` other	 377		   22 175	  3 566


OpenVZ 2.6.27-aivazovsky

combined:	 510		   59 606	  2 921
 ` mod:	  65		   31 933	      0
 ` core:	 455		   27 673	  2 921

File history

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Date/TimeThumbnailDimensionsUserComment
current10:33, 25 March 2009Thumbnail for version as of 10:33, 25 March 20091,200 × 770 (55 KB)Kir (talk | contribs)This shows KLOC (thousands lines of code) changes in three kernels: * OpenVZ 2.6.27-aivazovsky,Z based on vanilla 2.6.27 kernel. * OpenVZ 2.6.18-028stab062.1, based on RHEL5 U3 kernel. * RHEL5 U3 2.6.18-128.1.1.el5, based on vanilla 2.6.18 kernel. '''Con
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